Reamer.



UNITEDl sTATEs PATENT oEETcE.

JOI-11dl B. SHIRER, 015` CHARLOTTE, NORTH CAROLINA.

BEAMER.

. Specification of Letters Patent. Application filed August 23, 1912.

Patented lita-.y 2W, 1913i..

. Serial No. 718,676.

To all 'wh-om it may concern:

Be it known that 1, JOHN B. Siriunn, a citizen of the United'States, residing at Charlotte, in the county of .Mecklenburg and State of North Carolina, have invented new and useful Improvements in Beamers, of which the following is a specification.

The inventionrelates to boring and drilling and more particularly to reamers, and has for an object to provide a reamer for boring and cutting.

The invent-ion embodies, among other -features, a reanier having .a series of removable cutting blades which, lwhen ar-l ranged on the reamer, will present a taper and which can be conveniently removed for the purpose osharpening the same or substituting new blades therefor.

In the further disclosure of the invention reference is to be had to the accompanying drawings constituting a part of this speciiication, in which similar characters of' reference denote Corresp riding parts in all the viewsand in which: g

Figure 1 is a side elevation of the reamer showing the cutting blades mounted thereon;` Fig. Q is a vertical longitudinal sectional view ot the reamer, the cutting blades hav- Blades 19 are adapted for connection with the stem 10 and each preferably consists ol a single piece at tempered steel or other material. having a cutting edge 20, the forward end ot'each blade being slightly curved to contorni to thedovetail groove 17 and provided with a tapered end 20 adapted to titinto the dovetail groove 1'?, a notch Lil being provided in each blade at the forward end to receive therein one of the pins 18 on the head 12, the other or rear end of each blade 19 being adapted to reposeon and partially encircle the seat 15 and provided with an aperture .22 through which a screw 23 is adapted to pass to secure the rear end o1l the blade to the fiange 13, the 'I'ront and rear edges of each blade being adapted to abut against the front and rear edges of the nent adjacent blade when thel said blades are mounted on the stein 10 as shown in Fig. 4, the longitudinal edge of each blade 19, opposite thecutlting edge Q5 thereof, being cut away to form openings between the blades when the same are mounted on the stem, as is also shown in Fig. Ll.

In mounting the blades upon the stem, the first blade is arranged so that the foring been removed therefrom; Fig. 3 is ward tapered end 2O will it into the dovea perspective view of one of the cutting tali groove 17 of the head 12, one of the pins 18 of the head being received in the notch 21 ot the blade, the rear end or' the blade being adapted to repose on the seat 15 and secured thereto by the screw passed through the aperture 22 in the blade and extending into the 'tiunge as mentioned heretofore. The next blade is then mounted in position on the/stem in the same inanner and by referring to Fig. 1 it. will be seen thatI the iront and rear portions oic the next blade will abut against the front and rear projecting portions of the iirst blade, the cutting away of the longitudinal edge 211 being adapted to provide an opening between the blades as shown. 1t will be further seen that when all of the blades are mounted uion the stem 10 in the manner r ntioned, the blades being primarily connected to the headV 12 and tlange 13, the said blades will present a tapered surface, the head 1Q being oi a smaller diameter than tl. i

blades; Fig. 4- is a vertical transverse sectional. view talren on the line 1 -4f. in Fig. 1; and Fig. 5 is a vertical transverse sectional view taken on the line 5-5 in Fig. Qf, the blades 4having been removed to disclose the pins for securing the iront ends of the blades to the reamer proper.

Referring more particularly to the views, use is made oil a stem 10 having a tapered end 11 adapted to receive a holder or handle, the other end of the said stem'terminating in a circular head 12, a circular flange 13 being formed with the stem 10 between the ends thereof, the said flange having a circular reduced portion 111- constituting a seat. l5 and provided with an opening 16 constituting an outlet for shavings and the like.

` A circular dovet-ail groove 17 is formed in the head 12 and a series of spaced pins 18 projects from the head l2* immediately l the said il adjacent the dovetail groove 17, flange 13,. will be readily understoodA pins being extended at right angles to the By providing the longitudinally.extending longitudinal plane of the stem 10, as shown openings between the blades, any shavings in Fig. 5. can pass between the blades and will not stem, of a head formed et one emol llereof, lange 'formed on the stem beween the eend to lle-reame@ wlmi lle eeme is in operation the sbevngs; will hen pass outwardly through opening formed' in the. flange 35E-ee shown.

The :eemer clese'ibegl is opemed in usual manner is particularly slclaptafle for use ifi formi: U' openings in petiex'ns for use in foumlry work and the like. It will be understood that do not limi?. myself to the particular use of the reame? mentioned above and that the Seme can be used for various purposes and, if desix able., slightly elerefl o suit such purposes, it being understood, however, that. the scope of invention is delned by the appended claims. By referring to Fig. 3 it will be Seen thot the beek edge of each blade is .prefe'ably n mille lower 'iban lle front outting edge, thus providing Sufficient clem?? ance so that he eutiug edge een readily grip uh-e' material :mil pefozrm ihe Clesred slxms of a head formed el; one end thereo and provided with fs, dov/tail gwove7 a ange formed. on the said heeel, a seat on 'lzce seid flange, olades for engagenent with lille sed'llead and the seid flange, the oward ends of the. said blades being 'mperecl for reception in the seid dovetail g1foo\fe,` and means for securing the real' ends of the said blades o the said ange.

3. ln a xeemer the combination with .e sem, of aA head formed one end thereof and provided with a dovebal groove, o Hooge formed 01o the seid head, a om 'le said flange, blades for engagement 'with ille said head and the seid Hnge, the lorward ends of the said blades being tapered for reception in elle said dovetnil groove, means for securing the real' ends of the said.

lefult. As: mentioned lleetooe, however, blades to the said Flange, and pins pojee- 1t :ll be omlercsood that uheolades can be 111g from the sind. head and eeelveel 111 notches formed in the forwel ends of lle 'said blades. A

el: In o reemer, the combina-tion with a Stem, of a head formed therewith, a imge formed with the Stem and provided Wh an opening, and blades for removable engagebe, e T11 any desired manner in orde that lie may elcently peform object lo?? which @eey efe intended. gurl eoablehe culling edges of ille blades to operate in the material hat is to be roamed Without imei'- 'ferenee 'by heremanng portions of the lolafcles. ment wrt-h he said head and Said Harige, che .ln'lavmg thus; desem/ed n.131 mventlon, l sind blades havmg pornons thereof out :may claim: to form openings between the blades with l. n o remmer, ille comlomfion with a the if'orwadend rear ends of one-blade engaging the forward. and meer ends of the next blade. In estmony whereof I alllx my sgnahfue in pyesenoe of two Witnesses.

JOHN B, SHIHER.

ends theeo, a plurality of blades for: emovable connection with the Said heafl and said lmgge plus on lli@ :solo head and exe tending iroo .no-tolles omeo in the forward enfle of the' said blecles. and means forl engagemens with lle rear ends of ille Seial 2. lil a. manier. tlle oombimlon with a 

